Summary of MULTIPLE DIMMING ISOLATED PWM CONTROLLER FOR HIGH-PERFORMANCE LED LIGHTING
Diodes Incorporated’s AL8116 is a dimming input controller for offline LED lamps that accepts 0–10 V, PWM, or potentiometer dimmer signals and converts them to a PWM output for isolated primary-side control via an optocoupler. It supports VCC from 10 V to 56 V, low operating current, adjustable bias current and minimum duty clamp settings, ±2.5% typical duty accuracy, PWM input from 0.2 kHz to 10 kHz, and built-in overtemperature protection. It is lead-free and RoHS compliant.
Parts used in the AL8116 Dimming Input Controller Project:
- AL8116 dimming input controller IC
- Optocoupler for isolated PWM transfer
- External resistor for CLAMP pin (to set minimum duty)
- Bias resistor for DIM pin (adjustable bias current source)
- 0 to 10 V dimmer or voltage source
- PWM signal source (0.2 kHz to 10 kHz)
- Potentiometer (0 to 100 kΩ)
- VCC supply (10 V to 56 V)
- Heat management/thermal protection components as needed
Diodes Incorporated announced the availability of the versatile dimming input controller for offline LED lamps. AL8116 works with three types of dimmer signal formats:
- 0 to 10 V dimming voltage
- PWM (Pulse Width Modulation) signal
- Simple potentiometer
It converts these to a PWM output signal which can easily be used to provide an isolated dimming control via an optocoupler to the primary side LED driver.
Features
- Wide VCC Operating Range 10 V to 56 V
- Low Operation Current (Typical 600 μA)
- Precision Dimmer Type with
- Voltage Potential: 0/1 V to 10 V
- PWM Dimming: 0.2 kHz to 10 kHz
- Potentiometer: 0 to 100 kΩ
- Adjustable Bias Current Source of DIM Pin
- Accurate Output Duty Cycle Tolerance ±2.5%
- Adjustable Minimum Output PWM Duty Clamping: 8%, 6%, 4%, and 2%
- Built-In Over Temperature Protection for Chip
- Totally Lead-Free & Fully RoHS Compliant
The AL8116 has a wide supply voltage range from 10 V to 56 V. The AL8116 Output Duty Cycle accuracy is typically ±2.5% and its minimum Output Duty cycle can be set through a CLAMP pin resistor.
Read more: MULTIPLE DIMMING ISOLATED PWM CONTROLLER FOR HIGH-PERFORMANCE LED LIGHTING
- What dimmer signal formats does the AL8116 accept?
The AL8116 accepts 0 to 10 V dimming voltage, PWM signals, and a simple potentiometer input. - What supply voltage range does the AL8116 support?
The AL8116 supports a wide VCC operating range from 10 V to 56 V. - How accurate is the AL8116 output duty cycle?
The AL8116 output duty cycle accuracy is typically ±2.5%. - Can the minimum PWM duty cycle be adjusted?
Yes, the minimum output PWM duty can be set through a CLAMP pin resistor with options like 8%, 6%, 4%, and 2%. - What PWM input frequency range does the AL8116 support?
The AL8116 supports PWM dimming input from 0.2 kHz to 10 kHz. - Does the AL8116 include thermal protection?
Yes, it has built-in over temperature protection for the chip. - What is the typical operating current of the AL8116?
The AL8116 has a low typical operating current of 600 μA. - Is the AL8116 compliant with RoHS?
Yes, the AL8116 is totally lead-free and fully RoHS compliant.
